Implement :cd command

widgets/account.go

@@ -90,6 +90,10 @@ func NewAccountView(conf *config.AccountConfig,
 	return acct
 }
 
+func (acct *AccountView) Name() string {
+	return acct.conf.Name
+}
+
 func (acct *AccountView) Children() []ui.Drawable {
 	return acct.grid.Children()
 }
@@ -173,6 +177,7 @@ func (acct *AccountView) onMessage(msg types.WorkerMessage) {
 	case *types.Done:
 		switch msg.InResponseTo().(type) {
 		case *types.OpenDirectory:
+			acct.msglist.SetStore(nil)
 			acct.worker.PostAction(&types.FetchDirectoryContents{},
 				func(msg types.WorkerMessage) {
 					store := acct.msgStores[acct.dirlist.selected]

widgets/directories.go

@@ -16,6 +16,7 @@ type DirectoryList struct {
 	dirs         []string
 	logger       *log.Logger
 	onInvalidate func(d ui.Drawable)
+	selecting    string
 	selected     string
 	spinner      *Spinner
 	worker       *types.Worker
@@ -58,11 +59,24 @@ func (dirlist *DirectoryList) UpdateList(done func(dirs []string)) {
 }
 
 func (dirlist *DirectoryList) Select(name string) {
-	dirlist.selected = name
-	dirlist.worker.PostAction(&types.OpenDirectory{Directory: name}, nil)
+	dirlist.selecting = name
+	dirlist.worker.PostAction(&types.OpenDirectory{Directory: name},
+		func(msg types.WorkerMessage) {
+			switch msg.(type) {
+			case *types.Error:
+				dirlist.selecting = ""
+			default:
+				dirlist.selected = dirlist.selecting
+			}
+			dirlist.Invalidate()
+		})
 	dirlist.Invalidate()
 }
 
+func (dirlist *DirectoryList) Selected() string {
+	return dirlist.selected
+}
+
 func (dirlist *DirectoryList) OnInvalidate(onInvalidate func(d ui.Drawable)) {
 	dirlist.onInvalidate = onInvalidate
 }